I have a hard time with this perspective. It's hard to measure. The quality difference of housing and healthcare in particular has increased dramatically in the US over the years and our minimum expectations have risen quite a bit as technology has progressed.

It's easier than ever to access quality education but that doesn't mean people will do it on their own accord. The cost of licensure or a diploma has certainly increased. Education for the disabled has improved dramatically.

Historical diseases of affluence now affect the poor more than the rich due to increased availability and affordability but costly procedures disproportionately favour the wealthy flipping the mortality picture. Despite that all cause mortality from cancer is down and survival rates are better. The disparity is real but it's not easy to attribute the cause in a neat package.

https://pubmed.ncbi.nlm.nih.gov/28408935/

https://www.sciencedirect.com/science/article/abs/pii/S00472...